Metallopolymer Films Exhibiting Three-Color Electrochromism in the UV/Vis and Near-IR Region: Remarkable Utility of Trimetallic Clusters Bearing Thienyl Pendants and Their Mixed-Valent Charge Transfer Transitions

Rumiko Matsuse, Masaaki Abe, Yuki Tomiyasu, Atsushi Inatomi, Hiroaki Yonemura, Sunao Yamada, Yoshio Hisaeda

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Novel oxo-centered, acetate-bridged trinuclear ruthenium clusters functionalized with two pyridine ligands with thienyl substituents, [Ru3O(CH3COO)6(CO)(L1)2] (1) and [Ru3O(CH3COO)6(CO)(L2)2] (2), where L1 = 4-(2-thienyl)pyridine and L2 = 4-(2,2′-bithienyl)pyridine, have been synthesized and characterized. The molecular structure of 2 has been determined by single-crystal X-ray diffraction. One-electron oxidation of 2 with silver(I) cation has led to the isolation of a CO-dissociated product, [Ru3O(CH3COO)6(H2O)(L2)2]PF6 (3·PF6), and subsequent reaction with 4-dimethylaminopyridine (dmap) gave [Ru3O(CH3COO)6(dmap)(L2)2]PF6 (4·PF6). Linear metallopolymers containing the {Ru3O(CH3COO)6} groups have been deposited onto indium-tin oxide surface via oxidative electropolymerization of 2, 3·PF6, and 4·PF6. These metallopolymer thin films exhibit three-color electrochromism in the UV/Vis and near-IR region associated with the Ru3 II,III,III, Ru3 III,III,III, and Ru3 III,III,IV oxidation states.

Original languageEnglish
Pages (from-to)136-146
Number of pages11
JournalJournal of Inorganic and Organometallic Polymers and Materials
Issue number1
Publication statusPublished - Jan 1 2013


All Science Journal Classification (ASJC) codes

  • Materials Chemistry
  • Polymers and Plastics

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